The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 1997
Filed:
Sep. 20, 1994
Keith L Frost, Seattle, WA (US);
Jon W Hayenga, Kent, WA (US);
James A Stephanick, Seattle, WA (US);
Robert C Schmidt, Redmond, WA (US);
NeoPath, Inc., Redmond, WA (US);
Abstract
A method for automatically focusing on a slide includes the steps of locating a coverslip, acquiring images from predetermined focal depths in the slide, and starting at an initial focal depth proximate the surface of the coverslip. A set of predetermined characteristics within each of the images are measured to generate at least one image measurement for each of the plurality of images. A focus measure is computed for each of the images, where each focus measure is a function of at least one image measurement. A best focus location is determined relative to a focal depth where an acquired image has a highest focus measure.